The Countess of Wessex wore a pair of earrings that we saw quite a lot last summer: cluster earrings by Dior. The earrings are made of resin beads designed to resemble pearls.

Photo: John Stillwell - WPA Pool/Getty Images

Also wearing cluster earrings: Princess Alexandra, who paired hers with one of her favorite pearl choker necklaces.

Photo: John Stillwell - WPA Pool/Getty Images

I'm especially intrigued by the Duchess of Gloucester's garden party jewels. This appears to be a set of coordinating earrings, brooch, and necklace. (Also -- check out that elaborate umbrella handle!)

Photos: John Stillwell - WPA Pool/Getty Images

Here's a closer look at the necklace and the brooch, which features intriguing heraldic motifs.